I found a fantastic vegan cookbook called Eat, Drink and Be Vegan. I've tried several recipes from it so far and every one is fantastic. In fact the two desserts I've tried are better than most in my omnivorous arsenal, plus I feel all righteous for eating desserts without tons of sugar and animal products :) This smoothie's also in there and I'm telling you, if you can get past the green color (hence no picture...not very pretty), you'll be making this every day for the rest of your life.
Freshly squeezed OJ (enough for easy blending, 1/2 - 1 cup?)
1 ripe mango
1 ripe avocado
about 1-2 cups chopped green (kale, chard, spinach, etc)
as much ice as desired
Blend it all up and check off your serving of weird leafy greens for the day!
P.S. I had to bribe Liam with a quarter to try it but then he loved it!